Tuesday, May 17, 2011

Fairly widespread rain or thundershowers unfold over the Northeastern States and scattered over adjoining east India, south Karnataka, Kerala and Lakshadweep from late this week.

This is as per the outlook given in an extended forecast issued by India Meteorological Department (IMD) on Sunday evening and valid until Friday.

MERCURY TRENDS

Meanwhile, maximum temperatures have continued to rise by 2 to 3 deg Celsius over parts of Jammu and Kashmir, Punjab and Uttar Pradesh through Saturday.

They were above normal by 2 to 4 deg Celsius over part of Jammu and Kashmir, Himachal Pradesh and Punjab as sustained heating from across the border in Pakistan touched off on local weather.

The maxima were above normal by 2 to 3 deg Celsius over parts of Rajasthan, Uttar Pradesh, Bihar, north Madhya Pradesh, north Chhattisgarh, Jharkhand, the Northeastern States, north Orissa, north interior Andhra Pradesh and north Karnataka.

FRESH WESTERLY

Thus, heating has become widespread from northwest to the interior with Brahmapuri in Maharashtra recording the highest maximum of 45.1 deg Celsius on Saturday.

Meanwhile, the IMD has said that a fresh western disturbance would impact northwest India from Thursday.

Isolated dusts storms or thunderstorms may occur over Rajasthan and west Uttar Pradesh until Tuesday.

The IMD also expected maximum temperatures to rise by 2 to 3 deg Celsius over northwest and adjoining central India until Thursday.

WEATHER FEATURES

On Sunday, however, an upper air trough ran down east-southeast from north Rajasthan to Gangetic West Bengal across Haryana, Uttar Pradesh, southwest Bihar and consummating in an upper air cyclonic circulation over Jharkhand.

Another upper air trough looked down to the south from southwest Madhya Pradesh and extended ended up in another cyclonic circulation over extreme south Tamil Nadu.

A third upper air cyclonic circulation hung over Assam, completing the rollout of pre-monsoon weather formations across the country.

CONVECTIVE CLOUDS

Satellite pictures on Sunday evening showed the presence of convective (rain-bearing) clouds over Andaman Sea and south Arabian Sea.

Low to medium clouds were seen over parts of northwest India, and west, central, east and south peninsular India.

A weather warning said that isolated thunder squalls would occur over Bihar, Jharkhand, West Bengal, Sikkim and Orissa until Tuesday. Isolated dust storms or thunderstorms may occur over Rajasthan, and west Uttar Pradesh.

FAIRLY WIDESPREAD

A short-term outlook until Wednesday said that fairly widespread rain or thundershowers would unfold over the Northeastern States, sub-Himalayan West Bengal and Sikkim.

It would be scattered over Gangetic West Bengal and isolated over rest east India, Chhattisgarh and west Maharashtra.

Scattered rain or thundershowers would break over south Karnataka and Kerala and isolated over the rest of south peninsular India.